排序一个Dictionary的Array

数组嵌套字典

NSArray<__kindof NSDictionary *> *array;

根据array内部的Dictionary某个Key排序

//字典数组按KEY排序
+ (NSArray *)sortArray:(NSArray *)array withKey:(NSString *)key {
    NSSortDescriptor *sortDesc = [NSSortDescriptor sortDescriptorWithKey:key ascending:YES];
    NSArray *sortDescArr = [NSArray arrayWithObject:sortDesc];
    NSArray *sortedArr = [array sortedArrayUsingDescriptors:sortDescArr];
    return sortedArr;
}

Array怎么排序

Array是根据sortDescriptors进行排序,其本身是一个NSSortDescriptor的Array.所以只需要根据key来创建NSSortDescriptor,并放入一个数组就可以了.

@interface NSArray<ObjectType> (NSSortDescriptorSorting)

- (NSArray<ObjectType> *)sortedArrayUsingDescriptors:(NSArray<NSSortDescriptor *> *)sortDescriptors;    // returns a new array by sorting the objects of the receiver

@end

@interface NSMutableArray<ObjectType> (NSSortDescriptorSorting)

- (void)sortUsingDescriptors:(NSArray<NSSortDescriptor *> *)sortDescriptors;    // sorts the array itself

@end

赏

请问老板还招人么(/ω＼)

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